योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-118, verse-13

बकाजगरमद्गूनां हृदि या प्राणिनां धृतिः ।
अचर्वितनिगीर्णानां मन्ये निद्रोपमैव सा ॥ १३ ॥

bakājagaramadgūnāṃ hṛdi yā prāṇināṃ dhṛtiḥ ,
acarvitanigīrṇānāṃ manye nidropamaiva sā 13

13. baka-ajagara-madgūnām hṛdi yā prāṇinām dhṛtiḥ |
acarvita-nigīrṇānām manye nidrā-upamā eva sā ||

13. prāṇinām baka-ajagara-madgūnām hṛdi yā dhṛtiḥ,
acarvita-nigīrṇānām sā eva nidrā-upamā manye.

13. The satisfaction (dhṛti) that exists in the hearts of creatures like cranes, pythons, and diving birds, I believe, is simply like sleep for those who have swallowed without chewing.

Words meanings summery:

• बक-अजगर-मद्गूनाम् (baka-ajagara-madgūnām) - of creatures resembling cranes, pythons, and diving birds (referring to their predatory nature) (of cranes, pythons, and diving birds)

• हृदि (hṛdi) - in the hearts (of these creatures) (in the heart, in the mind)

• या (yā) - which (refers to dhṛti) (which, who, what (feminine))

• प्राणिनाम् (prāṇinām) - of these creatures (cranes, pythons, etc.) (of living beings, of creatures)

• धृतिः (dhṛtiḥ) - satisfaction, contentment (derived from consumption) (satisfaction, contentment, firmness, courage)

• अचर्वित-निगीर्णानाम् (acarvita-nigīrṇānām) - of those who consume hastily without proper digestion (like the predators) (of those who have swallowed without chewing)

• मन्ये (manye) - I believe (the author's opinion) (I think, I believe, I consider)

• निद्रा-उपमा (nidrā-upamā) - simply like sleep (implying unconscious, unenjoyable state) (comparable to sleep, likeness to sleep)

• एव (eva) - simply, merely (indeed, just, only)

• सा (sā) - that (satisfaction) (she, that (feminine))

Words meanings and morphology

बक-अजगर-मद्गूनाम् (baka-ajagara-madgūnām) - of creatures resembling cranes, pythons, and diving birds (referring to their predatory nature) (of cranes, pythons, and diving birds)

(noun)

Genitive, masculine, plural of baka-ajagara-madgu

baka-ajagara-madgu - cranes, pythons, and diving birds (as a group)

Compound type : dvandva (baka+ajagara+madgu)

• baka – a crane
  noun (masculine)
• ajagara – a python, a large snake
  noun (masculine)
• madgu – a diving bird, cormorant
  noun (masculine)

Note: Refers to the category of predatory creatures.

हृदि (hṛdi) - in the hearts (of these creatures) (in the heart, in the mind)

(noun)

Locative, neuter, singular of hṛd

hṛd - heart, mind, conscience

या (yā) - which (refers to dhṛti) (which, who, what (feminine))

(pronoun)

Nominative, feminine, singular of yad

yad - which, what

Note: Relative pronoun referring to 'dhṛtiḥ'

प्राणिनाम् (prāṇinām) - of these creatures (cranes, pythons, etc.) (of living beings, of creatures)

(noun)

Genitive, masculine, plural of prāṇin

prāṇin - living being, animal, creature

Root: prāṇ

धृतिः (dhṛtiḥ) - satisfaction, contentment (derived from consumption) (satisfaction, contentment, firmness, courage)

(noun)

Nominative, feminine, singular of dhṛti

dhṛti - satisfaction, contentment, firmness, courage, resolve

From root 'dhṛ'

Root: dhṛ (class 1)

अचर्वित-निगीर्णानाम् (acarvita-nigīrṇānām) - of those who consume hastily without proper digestion (like the predators) (of those who have swallowed without chewing)

(adjective)

Genitive, masculine, plural of acarvita-nigīrṇa

acarvita-nigīrṇa - swallowed unchewed, devoured whole

Compound type : tatpuruṣa (acarvita+nigīrṇa)

• a-carvita – unchewed
  adjective (neuter)
  Past Passive Participle (negative prefix)
  Negative prefix 'a' + 'carvita' (from root 'carv')
  Prefix: a
  Root: carv
• nigīrṇa – swallowed, devoured
  adjective (neuter)
  Past Passive Participle
  From root 'gṝ' with prefix 'ni'
  Prefix: ni
  Root: gṝ (class 6)

Note: Used substantively, referring to the creatures.

मन्ये (manye) - I believe (the author's opinion) (I think, I believe, I consider)

(verb)

1st person , singular, middle, present indicative (laṭ) of man

Present indicative, first person singular

Class 4 verb, ātmanepada

Root: man (class 4)

निद्रा-उपमा (nidrā-upamā) - simply like sleep (implying unconscious, unenjoyable state) (comparable to sleep, likeness to sleep)

(noun)

Nominative, feminine, singular of nidrā-upamā

nidrā-upamā - a simile of sleep, comparable to sleep

Compound type : ṣaṣṭhī-tatpuruṣa (nidrā+upamā)

• nidrā – sleep
  noun (feminine)
• upamā – comparison, simile, likeness
  noun (feminine)
  From prefix 'upa' + root 'mā'
  Prefix: upa
  Root: mā

Note: Predicate nominative for 'sā'

एव (eva) - simply, merely (indeed, just, only)

(indeclinable)

सा (sā) - that (satisfaction) (she, that (feminine))

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it

Note: Refers to 'dhṛtiḥ'